Around 1952 - 54 (Well, the 50's something...) or thereabouts, my dad took me to the RAAF Richmond airshow, and during the performance of 'something' out over the field, a Beau came in RATHER low from over the hangars at the back of the crowd, while no-one was looking - and truly, I can remember we did not hear it until.....
I cannot remember if it was based at Richmond at the time, but think it may have flown in for the day.
I was impressed.
Cheers
